<template>
	<view class="container">
		<!-- 空白页 -->
		<view v-if="!hasLogin || empty===true" class="empty">
			<image src="/static/emptyCart.jpg" mode="aspectFit"></image>
			<view v-if="hasLogin" class="empty-tips">
				空空如也
				<navigator class="navigator" v-if="hasLogin" url="../index/index" open-type="switchTab">随便逛逛></navigator>
			</view>
			<view v-else class="empty-tips">
				空空如也
				<view class="navigator" @click="navToLogin">去登陆></view>
			</view>
		</view>
		<view v-else>
			<!-- 列表 -->
			<view class="cart-list">
				<block v-for="(items, indexs) in cartList" :key="indexs">
					<!-- :class="{'b-b': index!==cartList.length-1}" -->
					<view v-for="(item, index) in items" :key="item.id" class="cart-item">
						<view class="image-wrapper">
							<image @tap="navToDetailPage" :data-productid="item.productId" :src="item.image" :class="[item.loaded]" mode="aspectFill"
							 lazy-load @load="onImageLoad('cartList', indexs, index)" @error="onImageError('cartList', indexs, index)"></image>
							<view class="yticon icon-xuanzhong2 checkbox" :class="{checked: item.checked}" @click="check('item', indexs, index)"></view>
						</view>
						<view class="item-right">
							<text @tap="navToDetailPage" :data-productid="item.productId" class="clamp title">{{item.productName}}</text>
							<!-- <text class="attr">{{item.attr_val}}</text> -->
							<text class="price">¥{{userType ==0 ?item.price:item.agentPrice}}</text>
							<text v-if="item.productActivity && item.productActivity.status==0" class="price" style="color: #FA436A;font-size: 24rpx;">{{item.productActivity.content}}</text>
							<uni-number-box class="step" :min="1" :max="item.stock" :value="item.productNum>item.stock?item.stock:item.productNum"
							 :isMax="item.productNum>=item.stock?true:false" :isMin="item.productNum===1" :indexs="indexs" :index="index"
							 @eventChange="numberChange"></uni-number-box>
						</view>
						<text class="del-btn yticon icon-fork" @click="deleteCartItem(indexs, index)"></text>
					</view>
				</block>
				<uni-load-more v-if="cartList.length>0" :status="isOver?'noMore':'loading'"></uni-load-more>
			</view>
			<!-- 底部菜单栏 -->
			<view class="action-section">
				<view class="checkbox">
					<image :src="allChecked?'/static/selected.png':'/static/select.png'" mode="aspectFit" @click="check('all')"></image>
					<view v-if="allChecked" class="clear-btn" :class="{show: allChecked}" @click="clearCart">
						清空
					</view>
				</view>
				<view class="total-box">
					<text class="price">¥{{total}}</text>
					<!-- <text class="coupon">
						已优惠
						<text>74.35</text>
						元
					</text> -->
				</view>
				<button type="primary" class="no-border confirm-btn" @click="createOrder">去结算</button>
			</view>
		</view>
	</view>
</template>

<script>
	import uniNumberBox from '@/components/uni-number-box.vue';
	let pageNo = 1;
	let pageSize = 20;
	let postIng = false;
	export default {
		components: {
			uniNumberBox
		},
		data() {
			return {
				total: 0, //总价格
				allChecked: false, //全选状态  true|false
				empty: false, //空白页现实  true|false
				cartList: [],
				isOver: false,
				hasLogin: false, //登陆状态
				userType: 0,
			};
		},
		onLoad() {
			console.log('购物车onload');
		},
		onShow() {
			console.log('购物车onShow');
			if (uni.getStorageSync('userInfo')) {
				this.hasLogin = true;
				this.userType = uni.getStorageSync('userInfo').isAgent;
				this.cartList = [];
				pageNo = 1;
				postIng = false;
				this.allChecked = false;
				this.total = 0;
				this.isOver = false;
				this.getCartList();
				//查询购物车数量
				this.$api.cartProductNum(uni.getStorageSync('userInfo').userCode);
			}

		},

		onReachBottom() {
			console.log('到底了');
			if (!postIng && !this.isOver) {
				pageNo++;
				this.getCartList();
			}
		},

		watch: {
			//显示空白页
			cartList(e) {
				let empty = e.length === 0 ? true : false;
				if (this.empty !== empty) {
					this.empty = empty;
				}
			}
		},
		methods: {
			//----------------------------------------点击------------------------------------------------
			//商品详情页跳转
			navToDetailPage(e) {
				let id = e.currentTarget.dataset.productid;
				uni.navigateTo({
					url: `/pages/product/product?id=${id}`
				})
			},
			//去登陆点击
			navToLogin() {
				uni.switchTab({
					url: '/pages/user/user'
				})
			},
			//选中状态处理
			check(type, indexs, index) {
				if (type === 'item') {
					this.cartList[indexs][index].checked = !this.cartList[indexs][index].checked;
				} else {
					const checked = !this.allChecked
					const list = this.cartList;
					list.forEach(item => {
						item.forEach(o => {
							o.checked = checked;
						})
					})
					this.allChecked = checked;
				}
				this.calcTotal(type);
			},

			//删除
			deleteCartItem(indexs, index) {
				let list = this.cartList;
				let row = list[indexs][index];
				let id = row.id;
				if (list[0].length == 1 && indexs == 0 && index == 0) {
					this.cartList = [];
				} else {
					this.cartList[indexs].splice(index, 1);
				}
				this.calcTotal();
				let userCode = uni.getStorageSync('userInfo').userCode;
				let cartParamList = [{
					cartId: id
				}];
				this.$api.operateCartProduct(userCode, '0', cartParamList);

			},

			//清空
			clearCart() {
				uni.showModal({
					content: '清空购物车？',
					success: (e) => {
						if (e.confirm) {
							let cartParamList = [];
							this.cartList.forEach(o => {
								o.forEach(oo => {
									let map = {
										cartId: oo.id
									}
									cartParamList.push(map);
								})
							})
							let userCode = uni.getStorageSync('userInfo').userCode;
							this.$api.operateCartProduct(userCode, '0', cartParamList);
							this.cartList = [];
						}
					}
				})
			},
			//----------------------------------------函数------------------------------------------------
			//请求购物车列表
			getCartList: function() {
				let than = this;
				if (!postIng) {
					postIng = true;
					than.$api.myPost({
						url: 'cartList',
						data: {
							pageNo: pageNo,
							pageSize: pageSize,
							userCode: uni.getStorageSync('userInfo').userCode
						},
						success(res) {
							postIng = false;
							if (res.status == 'success' && res.shoppingCartList) {
								if (res.shoppingCartList.length < pageSize) {
									than.isOver = true;
								}
								if (res.shoppingCartList.length > 0) {
									res.shoppingCartList.forEach(o => {
										o.checked = false;
										o.image = o.image.split(',')[0];
									})
									than.$set(than.cartList, pageNo - 1, res.shoppingCartList);
									than.calcTotal(); //计算总价	
								}
							} else {
								than.isOver = true;
							}
						}
					})
				}
			},

			//计算总价
			calcTotal() {
				let than = this;
				let list = this.cartList;
				if (list.length === 0) {
					this.empty = true;
					return;
				}
				let total = 0;
				let checked = true;
				list.forEach(o => {
					o.forEach(item => {
						if (item.checked === true) {
							let price = than.userType == 0 ? Number(item.price) : Number(item.agentPrice);
							total += Number(price * item.productNum);
							if (item.productActivity && item.productActivity.status == 0) {
								if (item.productActivity.type == 0 && Number(total) >= Number(item.productActivity.price)) {
									//0单次满减活动
									total = Number(total) - Number(item.productActivity.reductionPrice);
								}
							}
						} else if (checked === true) {
							checked = false;
						}
					})
				})
				this.allChecked = checked;
				this.total = Number(total.toFixed(2));
			},

			//去结算
			createOrder() {
				if (uni.getStorageSync('userInfo')) {

					let list = this.cartList;
					let goodsData = [];
					list.forEach(items => {
						items.forEach(item => {
							if (item.checked) {
								goodsData.push(item);
							}
						})
					})
					if (goodsData.length > 0) {
						uni.navigateTo({
							url: `/pages/order/createOrder?data=${JSON.stringify({goodsData: goodsData})}`
						})
					} else {
						this.$api.msg('请选择购买的商品');
					}
				} else {
					this.$api.msg('请先登录');
				}
			},

			//--------------------------------------监听-------------------------------------------------------------
			//监听image加载完成
			onImageLoad(key, indexs, index) {
				this.$set(this[key][indexs][index], 'loaded', 'loaded');
			},
			//监听image加载失败
			onImageError(key, indexs, index) {
				this[key][indexs][index].image = '/static/errorImage.jpg';
			},

			//数量变化监听
			numberChange(data) {
				console.log('数量-------', data)
				var oldnum = this.cartList[data.indexs][data.index].productNum;
				this.cartList[data.indexs][data.index].productNum = data.number;
				console.log('数量----1---', oldnum)
				var userCode = uni.getStorageSync('userInfo').userCode;
				var cartParamList = [];
				var operateType = data.number > oldnum ? 1 : 2; //操作类型0删除商品1增加商品2减少商品
				var map = {};
				if (operateType == 1) { //增
					map = {
						cartId: this.cartList[data.indexs][data.index].id,
						productNum: Number(data.number) - Number(oldnum)
					}
				} else { //减
					map = {
						cartId: this.cartList[data.indexs][data.index].id,
						productNum: Number(oldnum) - Number(data.number)
					}
				}
				cartParamList.push(map);
				this.$api.operateCartProduct(userCode, operateType, cartParamList)
				this.calcTotal();
			},

		}
	}
</script>

<style lang='scss'>
	.container {
		padding-bottom: 134upx;

		/* 空白页 */
		.empty {
			position: fixed;
			left: 0;
			top: 0;
			width: 100%;
			height: 100vh;
			padding-bottom: 100upx;
			display: flex;
			justify-content: center;
			flex-direction: column;
			align-items: center;
			background: #fff;

			image {
				width: 240upx;
				height: 160upx;
				margin-bottom: 30upx;
			}

			.empty-tips {
				display: flex;
				font-size: $font-sm+2upx;
				color: $font-color-disabled;

				.navigator {
					color: $uni-color-primary;
					margin-left: 16upx;
				}
			}
		}
	}

	/* 购物车列表项 */
	.cart-item {
		display: flex;
		position: relative;
		padding: 30upx 40upx;

		.image-wrapper {
			width: 230upx;
			height: 230upx;
			flex-shrink: 0;
			position: relative;

			image {
				border-radius: 8upx;
			}
		}

		.checkbox {
			position: absolute;
			left: -16upx;
			top: -16upx;
			z-index: 8;
			font-size: 44upx;
			line-height: 1;
			padding: 4upx;
			color: $font-color-disabled;
			background: #fff;
			border-radius: 50px;
		}

		.item-right {
			display: flex;
			flex-direction: column;
			flex: 1;
			overflow: hidden;
			position: relative;
			padding-left: 30upx;

			.title,
			.price {
				font-size: $font-base + 2upx;
				color: $font-color-dark;
				height: 40upx;
				line-height: 40upx;
			}

			.attr {
				font-size: $font-sm + 2upx;
				color: $font-color-light;
				height: 50upx;
				line-height: 50upx;
			}

			.price {
				height: 50upx;
				line-height: 50upx;
			}
		}

		.del-btn {
			padding: 4upx 10upx;
			font-size: 34upx;
			height: 50upx;
			color: $font-color-light;
		}
	}

	/* 底部栏 */
	.action-section {
		/* #ifdef H5 */
		margin-bottom: 100upx;
		/* #endif */
		position: fixed;
		left: 30upx;
		bottom: 30upx;
		z-index: 95;
		display: flex;
		align-items: center;
		width: 690upx;
		height: 100upx;
		padding: 0 30upx;
		background: rgba(255, 255, 255, .9);
		box-shadow: 0 0 20upx 0 rgba(0, 0, 0, .5);
		border-radius: 16upx;

		.checkbox {
			height: 52upx;
			position: relative;

			image {
				width: 52upx;
				height: 100%;
				position: relative;
				z-index: 5;
			}
		}

		.clear-btn {
			position: absolute;
			left: 26upx;
			top: 0;
			z-index: 4;
			width: 0;
			height: 52upx;
			line-height: 52upx;
			padding-left: 38upx;
			font-size: $font-base;
			color: #fff;
			background: $font-color-disabled;
			border-radius: 0 50px 50px 0;
			opacity: 0;
			transition: .2s;

			&.show {
				opacity: 1;
				width: 120upx;
			}
		}

		.total-box {
			flex: 1;
			display: flex;
			flex-direction: column;
			text-align: right;
			padding-right: 40upx;

			.price {
				font-size: $font-lg;
				color: $font-color-dark;
			}

			.coupon {
				font-size: $font-sm;
				color: $font-color-light;

				text {
					color: $font-color-dark;
				}
			}
		}

		.confirm-btn {
			padding: 0 38upx;
			margin: 0;
			border-radius: 100px;
			height: 76upx;
			line-height: 76upx;
			font-size: $font-base + 2upx;
			background: $uni-color-primary;
			box-shadow: 1px 2px 5px rgba(217, 60, 93, 0.72)
		}
	}

	/* 复选框选中状态 */
	.action-section .checkbox.checked,
	.cart-item .checkbox.checked {
		color: $uni-color-primary;
	}
</style>
